Malicious PDF — malware analysis report

Static analysis result for SHA-256 743b74ac5512424d…

MALICIOUS

PDF

59.0 KB Created: 2020-12-08 17:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: baf3cdf75fc58d2732531cc2b446bcd2 SHA-1: bc11640db60a7efd900634636a796cce2406a47d SHA-256: 743b74ac5512424d1c6a59a0379e216929eee0ea940dc39959736d4738749010
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary URL points to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. While no scripts were extracted, the structure and heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/strik?utm_term=funniest+clean+gifs In PDF document text
    • https://pajoxobonojizo.weebly.com/uploads/1/3/4/7/134702513/dedozamis.pdfIn PDF document text
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/xosaropowige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_5fb920be2718b.pdfIn PDF document text
    • https://nowawizerazez.weebly.com/uploads/1/3/4/5/134519823/35d28e9abdd.pdfIn PDF document text
    • https://mebijakonenu.weebly.com/uploads/1/3/4/4/134458360/4741302.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/3ea7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/lg_lp1015wnr_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/loroxodefevi.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/87465516448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60de4f17-eeae-49f5-b1d4-a4620d0e9242/an_introduction_to_differential_equa.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/97070006739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac51ae0a-27c1-4853-b176-8b41576e917b/96327460326.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD77 4908 bytes
SHA-256: f19b33c225252a8aba50ec798687cc3d8b342d6fd8a0c4606dcb020e704a0c80
font_01_sfnt_off0000be47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE47 9916 bytes
SHA-256: 5159be96b20b9dd914d89e2d1a07304e0657ebf8f90d42b879d5f871f3115044

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